Analisis luaran kardiovaskular pasien jantung koroner fraksi ejeksi <30% dengan Ischemic Burden <10% Pasca Off-Pump Coronary Artery Bypass Grafting dibandingkan Konvensional = Cardiovascular outcomes in coronary artery disease patients with ejection fraction <30% and Ischemic Burden <10% Undergoing Off-Pump compared to On-Pump Coronary Artery Bypass Grafting